Flight Plan

OK,
How can I set up an IFR flight plan where I can launch from airport A, Fly a mail route or practice touch-and-gos at airport B, C, D, and E then return to airport A?
I am really enjoying flying IFR but even under VFR I cannot do this and use GPS navigation.
I guess if I sat down and wrote down all the radio freqs I could do this. But not being very good at radio navigation, I would much rather just load a flight thru flight planner and go.
Scotch
How can I set up an IFR flight plan where I can launch from airport A, Fly a mail route or practice touch-and-gos at airport B, C, D, and E then return to airport A?
I am really enjoying flying IFR but even under VFR I cannot do this and use GPS navigation.
I guess if I sat down and wrote down all the radio freqs I could do this. But not being very good at radio navigation, I would much rather just load a flight thru flight planner and go.
Scotch